Investigation of Unsteady-State RedOx Mechanisms over Ceria Based Catalysts for Partial Oxidation of Methane Full article
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Natural Gas Conversion VIII: 8th Natural Gas Conversion Symposium 27-31 May 2007 , Natal |
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| Source | Natural Gas Conversion VIII : Proceedings of the 8th Natural Gas Conversion Symposium, 27-31 May 2007, Natal, Brazil Compilation, Elsevier B.V.. 2007. 532 c. ISBN 9780444530783. |
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| Journal |
Studies in Surface Science and Catalysis
ISSN: 0167-2991 |
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| Output data | Year: 2007, Volume: 167, Pages: 287-292 Pages count : 6 DOI: 10.1016/S0167-2991(07)80146-7 | ||||
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Abstract:
Within the perspective of new domains of application like domestic hydrogen production from natural for fuel cell, the kinetic behavior of the most performing catalytic systems has to be properly taken into account under transient conditions and at short contact time because it corresponds to frequent operating procedures such as process startup, shutdown, and fast changes in energy demand. To illustrate this new requirement, a transient kinetic approach of the partial oxidation of methane to syngas over Pt/ceria (ceria-zirconia)-based materials for which the authors have already carried out and reported various physicochemical, kinetic, and mechanistic investigations is presented. Ceria-based mixed oxides (CexM1–xOy) are versatile solid oxygen exchangers. At high temperatures (400–800ºC), the redox cycle Ce3+⇔Ce4+ + e– facilitates oxygen storage and release from the bulk fluorite lattice. When combined with noble or nonnoble metal particles, this makes them ideal candidates for catalytic oxidation applications, such as the partial oxidation of methane (POM) into syngas. However, the surface redox chemistry of ceria is highly sensitive to crystal structure defects, which can be tuned by substituting some of the Ce cations with ions of different size and/or charge as illustrated in this chapter using Zr as a doping cation. This chapter describes the main role of the metal and of the support as a function of the applied transient operating conditions.
Cite:
Mirodatos C.
, Schuurman Y.
, van Veen A.C.
, Sadykov V.A.
, Pinaeva L.G.
, Sadovskaya E.M.
Investigation of Unsteady-State RedOx Mechanisms over Ceria Based Catalysts for Partial Oxidation of Methane
In compilation Natural Gas Conversion VIII : Proceedings of the 8th Natural Gas Conversion Symposium, 27-31 May 2007, Natal, Brazil. – Elsevier B.V.., 2007. – C.287-292. – ISBN 9780444530783. DOI: 10.1016/S0167-2991(07)80146-7 WOS Scopus РИНЦ ANCAN OpenAlex
Investigation of Unsteady-State RedOx Mechanisms over Ceria Based Catalysts for Partial Oxidation of Methane
In compilation Natural Gas Conversion VIII : Proceedings of the 8th Natural Gas Conversion Symposium, 27-31 May 2007, Natal, Brazil. – Elsevier B.V.., 2007. – C.287-292. – ISBN 9780444530783. DOI: 10.1016/S0167-2991(07)80146-7 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Published print: | Jan 1, 2007 |
| Published online: | Oct 2, 2007 |
Identifiers:
| Web of science: | WOS:000283536600047 |
| Scopus: | 2-s2.0-35348978263 |
| Elibrary: | 13564715 |
| Chemical Abstracts: | 2008:407472 |
| Chemical Abstracts (print): | 149:358898 |
| OpenAlex: | W1608351845 |